Question

A driver in a bus moving with 40 m/s sees a girl at 25m distance. If he retards bus at 5 m/s2 , can he save the girl or not? give me proper solution so that I can understand plzz

Answer 1

Answer:

Given,

Speed=20m/s,d=50m,retardation=5m/s  

2

 

Let the ppossible reaction time be t  

s

​  

 So the car moves 20tm And applied breaks with retardation 5m/s  

2

 

So, the total distance under retardation is ≤50m

Thus the distance under  the application of retardation =  

2×5

20  

2

−0  

2

 

​  

=s  

′

⇒s  

′

=40m

Therefore,  20t  

s

​  

+40≤=50⇒20t  

s

​  

≤50−40⇒20t  

s

​  

=10⇒t  

s

​  

≤  

2

1

​  

≤0.5s

Explanation:

Answer 2

Answer:

yes he can save the girl at the speed of 0.5 metre per second

Explanation:

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